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2013-14 Shelby GT500
Updating a tune
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<blockquote data-quote="Norton" data-source="post: 16189098" data-attributes="member: 145307"><p>My tuning experience is limited, but mirrors what others have said about how to update/flash an ECU.</p><p></p><p>I'm also no fuels expert, but I respectfully disagree that ethanol-blended fuel is better than unblended fuel. Newer cars are compatible with ethanol-blended fuels but, unless they're tuned specifically for it, unblended fuel seems like a better option for several reasons...</p><p> - Ethanol holds less energy than gasoline, so performance and mileage both suffer from its use</p><p> - Ethanol offers high octane, but that means little once its blended; 91 octane is 91 octane</p><p> - Ethanol is hygroscopic, so it absorbs water from the atmosphere</p><p> - Ethanol is subject to phase separation, which can be problematic for those who store our cars for extended periods</p><p> - Ethanol is corrosive</p><p> - Ethanol can damage (older vehicles') rubber seals and engines</p><p></p><p>FWIW, the Sunoco fuel reps at SEMA recommended using an unblended fuel (that offers twice the shelf life of blended options) when storing vehicles.</p></blockquote><p></p>
[QUOTE="Norton, post: 16189098, member: 145307"] My tuning experience is limited, but mirrors what others have said about how to update/flash an ECU. I'm also no fuels expert, but I respectfully disagree that ethanol-blended fuel is better than unblended fuel. Newer cars are compatible with ethanol-blended fuels but, unless they're tuned specifically for it, unblended fuel seems like a better option for several reasons... - Ethanol holds less energy than gasoline, so performance and mileage both suffer from its use - Ethanol offers high octane, but that means little once its blended; 91 octane is 91 octane - Ethanol is hygroscopic, so it absorbs water from the atmosphere - Ethanol is subject to phase separation, which can be problematic for those who store our cars for extended periods - Ethanol is corrosive - Ethanol can damage (older vehicles') rubber seals and engines FWIW, the Sunoco fuel reps at SEMA recommended using an unblended fuel (that offers twice the shelf life of blended options) when storing vehicles. [/QUOTE]
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2013-14 Shelby GT500
Updating a tune
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